diff --git a/tests/utils.cpp b/tests/utils.cpp
index 255a4fec..cdfdbaca 100644
--- a/tests/utils.cpp
+++ b/tests/utils.cpp
@@ -21,7 +21,7 @@ void prepare_logdir()
 
 std::string file_contents(const std::string &filename)
 {
-    std::ifstream ifs(filename);
+    std::ifstream ifs(filename, std::ios_base::binary);
     if (!ifs)
     {
         throw std::runtime_error("Failed open file ");